5x5

gnomon: sundial with exacting perforations shows the time of day in digits with instructions to make your own

race to the bottom: more and more countries are outfitting outposts in Antarctica, via Superpunch

biscione: the heraldic serpent borne on the Alfa-Romeo logo is a viper eating a child—or possibly a Moor

out standing in the field: more winners and runners up for National Geographic’s photography contest

fist-bump: handshaking protocol from around the world